It's true that what you say is that there are no 100% accurate predictions, it's just that perhaps by predicting them we can understand a little of the developments that are occurring.
-cut-Same in the case here, but the technical analysis of the people are so strong the in the trading not all but some of the traders who have studies the coins and they have even all the information about the graphs of the coins. But still the may fail at some points due to the market up and down. So I didn't fully believed in these things like following them on different occasions.
Yes I agree with that, as I said no prediction is 100% accurate.
In fact, predictions always involve uncertainty (speculation), but having experience and knowledge can help us manage risk. Although technical analysis can be powerful, market fluctuations remain a factor that is difficult to fully predict.